Method of Transmitting Uplink Control Signals in Wireless Communication System

1. A method of transmitting uplink control signals in a wireless communication system using at least one subframe comprising two slots, each slot including a plurality of symbols, the wireless communication system configured to transmit a scheduling request (SR) via a preassigned SR physical uplink control channel (PUCCH) resource and to transmit a ACK/NACK via a preassigned ACK/NACK physical uplink control channel (PUCCH) resource, the method comprising: determining whether or not an ACK/NACK and a SR are to be transmitted in a subframe; and transmitting the ACK/NACK and the SR in the subframe via the preassigned SR PUCCH resource if the step of determining indicates that the ACK/NACK and the SR are to be transmitted in the subframe.

2. The method of claim 1 , wherein the SR is indicated by one of a positive and a negative transmission, the positive transmission being a presence of a SR transmission and the negative transmission being an absence of the SR transmission.

3. The method of claim 2 , wherein the step of determining comprises: indicating that the ACK/NACK is to be transmitted in the subframe via the preassigned SR PUCCH resource when the SR is to be indicated by the positive transmission and the ACK/NACK is to be transmitted.

4. The method of claim 2 , further comprising: transmitting the ACK/NACK in the subframe via the preassigned ACK/NACK PUCCH resource if the step of determining indicates that the ACK/NACK and the SR are to be transmitted in the subframe when the SR is to be indicated by the negative transmission and the ACK/NACK is to be transmitted.

5. The method of claim 1 , wherein the step of transmitting the ACK/NACK and the SR in the subframe comprises: determining a frequency domain sequence and an orthogonal sequence based on the preassigned SR PUCCH resource; spreading the ACK/NACK with the frequency domain sequence and the orthogonal sequence to generate a mapped sequence; and transmitting the mapped sequence in the subframe.

6. The method of claim 1 , further comprising: transmitting the SR in the subframe via the preassigned SR PUCCH resource if the step of determining indicates that the SR is to be transmitted only.

7. The method of claim 1 , further comprising: transmitting the ACK/NACK in the subframe via the preassigned ACK/NACK PUCCH resource if the step of determining indicates that the ACK/NACK is to be transmitted only.

8. A mobile communication apparatus configured to transmit uplink control signals in a wireless communication system using at least one subframe comprising two slots, each slot including a plurality of symbols, the wireless communication system configured to transmit a scheduling request (SR) via a preassigned SR physical uplink control channel (PUCCH) resource and to transmit a ACK/NACK via a preassigned ACK/NACK physical uplink control channel (PUCCH) resource, the mobile communication apparatus comprising: a transmitter configured to determine whether or not an ACK/NACK and a SR are to be transmitted in a subframe, and transmit the ACK/NACK and the SR in the subframe via the preassigned SR PUCCH resource if the transmitter determines that the ACK/NACK and the SR are to be transmitted in the subframe.

9. The mobile communication apparatus of claim 8 , wherein the SR is indicated by one of a positive and a negative transmission, the positive transmission being a presence of a SR transmission and the negative transmission being an absence of the SR transmission.

10. The mobile communication apparatus of claim 9 , wherein the transmitter determines that the ACK/NACK and the SR are to be transmitted in the subframe via the preassigned SR PUCCH resource when the SR is to be indicated by the positive transmission and the ACK/NACK is to be transmitted.

11. The mobile communication apparatus of claim 9 , wherein the transmitter is further configured to transmit the ACK/NACK in the subframe via the preassigned ACK/NACK PUCCH resource if the step of determining indicates that the ACK/NACK and the SR are to be transmitted in the subframe when the SR is to be indicated by the negative transmission and the ACK/NACK is to be transmitted.

12. The mobile communication apparatus of claim 8 , wherein when transmitting the ACK/NACK and the SR in the frame, the transmitter is configured to determine a frequency domain sequence and an orthogonal sequence based on the preassigned SR PUCCH resource; spread the ACK/NACK with the frequency domain sequence and the orthogonal sequence to generate a mapped sequence; and transmit the mapped sequence in the subframe.

13. The mobile communication apparatus of claim 8 , wherein the transmitter is further configured to transmit the SR in the subframe via the preassigned SR PUCCH resource if the transmitter determines that the SR is to be transmitted only.

14. The mobile communication apparatus of claim 8 , wherein the transmitter is further configured to transmit the ACK/NACK in the subframe via the preassigned ACK/NACK PUCCH resource if the transmitter determines that the ACK/NACK is to be transmitted only.